Smooth sounds and funky grooves will fill Show Place Arena on Saturday night, when groups with shared musical roots come together for "Soul Fest." On the bill are War, Atlantic Starr, Rose Royce, Chuck Brown and Zapp. Doors open at 6 p.m.; the show starts at 7 p.m. at the performance hall, 14900 Pennsylvania Ave. in Upper Marlboro. Tickets are $50. 301-952-7999.
To commemorate the first U.S. airmail flight, which took off from the College Park Airport 86 years ago, the College Park Aviation Museum is hosting a program for children Sunday. During the event, which is geared toward elementary school-age children, museum staff members will tell stories and teach postal history with the help of a vintage airmail plane, the Curtiss Jenny. Children will use stamps to make crafts and can decorate cardboard picture frames for photos of themselves posing as pilots. The program is from noon to 4 p.m. and is free with museum admission: adults, $4; seniors and groups, $3; students and children, $2. College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. 301-864-6029.
On weekend afternoons at the Patuxent Rural Museums in Upper Marlboro, visitors can learn about late-19th- and early-20th- century life in southern Prince George's County. Activities include watching open-hearth cooking and blacksmith demonstrations and attempting to label some of the mysterious tools on display, such as old-fashioned garlic presses and apple corers. There's no charge to enter the buildings -- including the Duvall Tool Museum, the Tobacco Farming Museum, Duckett Log Cabin and blacksmith and farrier shops -- that make up the museum complex. Hours are 1-4 p.m. Saturdays and Sundays through October. Patuxent River Park is at 16000 Croom Airport Rd., reached via Route 301 in Upper Marlboro. 301-627-6074.